From: Andi Kleen <ak@linux.intel.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>,
Dave Hansen <dave.hansen@intel.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
X86 ML <x86@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Arnd Bergmann <arnd@arndb.de>,
"H. Peter Anvin" <hpa@zytor.com>,
linux-arch <linux-arch@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux API <linux-api@vger.kernel.org>
Subject: Re: [RFC, PATCHv2 29/29] mm, x86: introduce RLIMIT_VADDR
Date: Wed, 11 Jan 2017 13:46:03 -0800 [thread overview]
Message-ID: <20170111214603.GF8388@tassilo.jf.intel.com> (raw)
In-Reply-To: <CA+55aFyhva9bw48G669z4QfJXjjJA5s+necfWmYoAB6eyzea=A@mail.gmail.com>
On Wed, Jan 11, 2017 at 11:31:25AM -0800, Linus Torvalds wrote:
> On Wed, Jan 11, 2017 at 11:20 AM, Andy Lutomirski <luto@amacapital.net> wrote:
> >
> > Taking a step back, I think it would be fantastic if we could find a
> > way to make this work without any inheritable settings at all.
> > Perhaps we could have a per-mm value that is initialized to 2^47-1 on
> > execve() and can be raised by ELF note or by prctl()?
>
> I definitely think this is the right model. No inheritable settings,
> no suid issues, no worries. Make people who want the large address
> space (and there aren't going to be a lot of them) just mark their
> binaries at compile time.
Compile time is inconvenient if you want to test some existing
random binary if it works.
I tried to write a tool which patched ELF notes into binaries
some time ago for another project, but it ran into difficulties
and didn't work everywhere.
An inheritance scheme is much nicer for such use cases.
-Andi
next prev parent reply other threads:[~2017-01-11 21:46 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-27 1:53 [PATCHv2 00/29] 5-level paging Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 01/29] x86/cpufeature: Add 5-level paging detecton Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 02/29] asm-generic: introduce 5level-fixup.h Kirill A. Shutemov
2017-01-27 11:06 ` Vlastimil Babka
2017-01-27 11:30 ` Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 03/29] asm-generic: introduce __ARCH_USE_5LEVEL_HACK Kirill A. Shutemov
2017-01-27 13:24 ` Vlastimil Babka
2017-01-27 13:55 ` Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 04/29] arch, mm: convert all architectures to use 5level-fixup.h Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 05/29] asm-generic: introduce <asm-generic/pgtable-nop4d.h> Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 06/29] mm: convert generic code to 5-level paging Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 07/29] mm: introduce __p4d_alloc() Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 08/29] x86: basic changes into headers for 5-level paging Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 09/29] x86: trivial portion of 5-level paging conversion Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 10/29] x86/gup: add 5-level paging support Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 11/29] x86/ident_map: " Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 12/29] x86/mm: add support of p4d_t in vmalloc_fault() Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 13/29] x86/power: support p4d_t in hibernate code Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 14/29] x86/kexec: support p4d_t Kirill A. Shutemov
2016-12-27 1:53 ` [PATCHv2 15/29] x86: convert the rest of the code to " Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 16/29] x86: detect 5-level paging support Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 17/29] x86/asm: remove __VIRTUAL_MASK_SHIFT==47 assert Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 18/29] x86/mm: define virtual memory map for 5-level paging Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 19/29] x86/paravirt: make paravirt code support " Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 20/29] x86/mm: basic defines/helpers for CONFIG_X86_5LEVEL Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 21/29] x86/dump_pagetables: support 5-level paging Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 22/29] x86/mm: extend kasan to " Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 23/29] x86/espfix: " Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 24/29] x86/mm: add support of additional page table level during early boot Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 25/29] x86/mm: add sync_global_pgds() for configuration with 5-level paging Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 26/29] x86/mm: make kernel_physical_mapping_init() support " Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 27/29] x86/mm: add support for 5-level paging for KASLR Kirill A. Shutemov
2016-12-27 1:54 ` [PATCHv2 28/29] x86: enable 5-level paging support Kirill A. Shutemov
2016-12-27 1:54 ` [RFC, PATCHv2 29/29] mm, x86: introduce RLIMIT_VADDR Kirill A. Shutemov
2016-12-27 2:06 ` Andy Lutomirski
2016-12-27 2:24 ` Kirill A. Shutemov
2016-12-27 3:22 ` Andy Lutomirski
2017-01-02 9:09 ` Kirill A. Shutemov
2016-12-29 2:53 ` Carlos O'Donell
2016-12-31 2:08 ` Andy Lutomirski
2017-01-02 8:35 ` Kirill A. Shutemov
2017-01-13 20:11 ` H.J. Lu
2017-01-02 8:44 ` Arnd Bergmann
2017-01-03 6:08 ` Andy Lutomirski
2017-01-03 13:18 ` Arnd Bergmann
2017-01-03 18:29 ` Andy Lutomirski
2017-01-03 22:07 ` Arnd Bergmann
2017-01-03 22:09 ` Andy Lutomirski
2017-01-04 13:55 ` Arnd Bergmann
2017-01-03 16:04 ` Kirill A. Shutemov
2017-01-03 18:27 ` Andy Lutomirski
2017-01-04 14:19 ` Kirill A. Shutemov
2017-01-05 17:53 ` Andy Lutomirski
2017-01-05 19:13 ` Dave Hansen
2017-01-05 19:29 ` Kirill A. Shutemov
2017-01-05 19:39 ` Dave Hansen
2017-01-05 20:11 ` Kirill A. Shutemov
2017-01-05 20:14 ` Andy Lutomirski
2017-01-05 20:49 ` Dave Hansen
2017-01-05 21:27 ` Andy Lutomirski
2017-01-05 23:17 ` Dave Hansen
2017-01-11 14:29 ` Kirill A. Shutemov
2017-01-11 18:09 ` Andy Lutomirski
2017-01-11 18:37 ` Kirill A. Shutemov
2017-01-11 18:49 ` Dave Hansen
2017-01-11 19:20 ` Andy Lutomirski
2017-01-11 19:31 ` Linus Torvalds
2017-01-11 21:46 ` Andi Kleen [this message]
2017-01-11 19:32 ` Kirill A. Shutemov
2017-01-11 19:39 ` Linus Torvalds
2017-01-11 18:26 ` Dave Hansen
2017-01-05 16:57 ` [PATCHv2 00/29] 5-level paging Kirill A. Shutemov
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